Datasheet

Section 19 Flash Memory
Rev. 3.00 Sep. 28, 2009 Page 512 of 710
REJ09B0384-0300
19.1.2 Mode Comparison
The comparison table of programming and erasing related items about boot mode, user program
mode, user boot mode, and programmer mode is shown in table 19.1.
Table 19.1 Comparison of Programming Modes
Boot mode
User program
mode
User boot mode
Programmer
mode
Programming/
erasing
environment
On-board On-board On-board PROM
programmer
Programming/
erasing enable
MAT
User MAT
User boot MAT
User MAT User MAT User MAT
User boot MAT
All erasure (Automatic) (Automatic)
Block division
erasure
*
1
×
Program data
transfer
From host via SCI Via optional device Via optional device Via programmer
Reset initiation
MAT
Embedded
program storage
MAT
User MAT User boot MAT*
2
⎯
Transition to user
mode
Changing mode
setting and reset
Changing FLSHE
bit and FWE pin
Changing mode
setting and reset
⎯
Notes: 1. All-erasure is performed. After that, the specified block can be erased.
2. Firstly, the reset vector is fetched from the embedded program storage MAT. After the
flash memory related registers are checked, the reset vector is fetched from the user
boot MAT.
• The user boot MAT can be programmed or erased only in boot mode and programmer mode.
• The user MAT and user boot MAT are erased in boot mode. Then, the user MAT and user
boot MAT can be programmed by means of the command method. However, the contents of
the MAT cannot be read until this state.
Only user boot MAT is programmed and the user MAT is programmed in user boot mode or
only user MAT is programmed because user boot mode is not used.
• The boot operation of the optional interface can be performed by the mode pin setting
different from user program mode in user boot mode.